Forging tool



R. ARMOUR FORGING TOOL March 22 1927.

2 sheets-sheen Filed July 21, 1923 Zza INVENTOR. .fi'tfiardArmour ATTORNEY.

March 22 1927.-

R. ARMOUR FORGING TOOL I INVENTOR. .FkkardArma ur:

ATTORNEY.

Patented Mar. 2 2,

' em I STATE-s f RICHABD'ARMOUR, OF LOS'ANGEEES; eiem'ren'mie FOBGING TOOL.

Application filed July 21,

This invention particularly pertains to a means and method for forging the s de portions oflink structures and wluch isespecially adapted for use informing the side members of the links or relns of well dr1ll ars. I i

An object of my invention is to provide a means whereby the bearing surfaces' of a jar rein may be readily forgedand shaped preparatory to machining to a limshedsurface, and whereby the sideportions of the rein maybe accurately formedto size.

Another object is to provide a deviceof the above character which is so constructed as toendure andbe'subject to but little wear, and which embodies few parts of simple construction. and arrangement.

Another object is to provide a forging tool whereby the inner surfaces of the side members of a link may be formed Without distorting the external contour of the link side members.

Another object is to provide a'rein-form- Y ing tool adapted tobe operated to form a rein by a steamihammerorthe like, in which the metalbeingwvorked will be maintained in proper dimensions-in cross section during the forming operation. v

lVith the foregoing objects" in view together with such other objects and advantages as may subsequently appear, my 1nvention resides'in the. parts andin the construction, combination and arrangement of parts or their equivalentsya's hereinafter described and claimed and illustrated by way of example in the accompanying, drawings, inwhichf v V Figure-1 isa plan View of the forging tool. Figure'2 is a View in longitudinal section as seen on the line 2+2'of;Figu re 1'.-

Fig. 3 is a detailfinf perspective illustrat ing'the reiin blankas formed, in readiness to be operated on by the tool. p

Figure 4 isa= detail in section 'ofthei rein blank as seenon' theline ofFigure 3. Figure 5 isr a detail in sectiomshowing the rein'asformed by means of the tool.

Figures 6 7,8; 9, 10-and 11 arechagrrams 7 illustrating. the operationof thetoolu Figureal2 is a detail in perspective illustrating the'reinas formed by the tool.

Figure'13 i'sa detail'in cross sectlon showingthe manner in which apair of reins are linked: toge then Figure lelis a detail in perspective of a 1923. Serial No, 6525984] supplemental mandrel adapted to be used: in

the tool.

More specifically, indicates a; base block which ispreferably rectangular and is formed on its upper face with atransverse channel 16 which opens at the sides of the block and is formed with a flat bottom-wall 17 extending. throughout the width Offthe baseblock and which channel'hasoppositely inclined end" walls 18 and 19-," The upper faces-20 and 21' at the end portionof the base block are'flat' and extend on aplane-parallel with the plane of the bottom wall 17 of the channel 16'. Thebottom wall-17 of the channel is formed Witha central; longitudina lily; extending dove-tail channel 22-adapted to receive a dove-tailfiange 23 on the unoler side of a mandrel 24, which mandrel: is adapted'to'be set in the channel and secured to the base block by akey 25 extendingglongitudinally between" one side-wall of the channel 22 and the dove-tail flange 23, which key cooperateswitha transverse key or gib '26 engaging opposite recesses 27; and 28 formed in the sides: of the channel and-flange 1 opposite the key 25' to automatically lock the mandrel 24' in: place. The mandrel 24 is formed with projectingside: flanges; 29 and 30 which extend over the keys 25 and 26. The upper face of the mandrel24 extendson a plane with the top faces 20*and' 21 of the base block, and the" opposite sides 31' and 32 of the mandrel are i inclined outwardly from the upper face thereof-to a point midway between the bottom wallf1 7 of the channel 16 and the topface of; the mandrel, thereby forming the man'dre'l wan a tapered cross section on its upper portion as'sh'own in v a Figure 2, whereby it is' adapted to be r introduced' between thers'icle member's of 'a' link or rein of a -jar' to be placed astridesthereof.

The sides 33 and 3 4 of the mandrel extendingibetween the inclined side's" 3l and 32 and the bottom wall 17 of lthe' channel are con"- cavethroug hout the length ofth'e' mandrel, being curved 5 on a"- radius struck from, a center on a-line e'xtendin'g 'm'idway of'th'e-de'pth or the channel 16, which "radius car-res onds ill length'tOV-OIIWhRIfthEdlQmG QET015 13119; jar.

Mounted'on 'the channel 16 and bearing .on the bottom wall 17' is a pain of slide blocks 35 and 36' spaced from-the' opposite sides' of the; mandrel 24, which slide'blbeks are formed with their upper faces extending on the" plane ofth'e' top faces 20 and 2 1 (if the base block, and have their inner side faces concave throughout their lengths and height, which faces are curved on a radius struck from a center located on a line extending midway between the bottom of the channel and the top of the side blocks which radius is of a length equal to one-half the diameter of the jar. Extending longitudinally through the slide'bloeks and 3G rods 37 and 38 which project beyond the end faces of the "slide blo'cks,--which end faces extend flush with the side faces of the base block. The ends of the rod 87 connect with a pair of horizontally extending bars and 40, the outer ends of which connect with a cross head 41, spacedfrom one end of the and 48 screwed into the ends of the base block and which bolts slldably extend through the crossheads ll and 4% and have nuts lS) and 50'screwed in their outer ends which serve to limit the outward movement of the cross heads 41 and as: and thereby limit the retractive movement of the slide blocks 35 and The slide blocks 35: and 36 areformed with vertically extending rear walls 51 and 52 which are arrangec'so that when the slide blocks are moved into their retracted position the lowerrear corners of the slide blocks will'be disposed vat the juncture of the inclined walls 18 and 19 of the channel 16 with the bottom wall 17 of the channel, as shown in Figure 2.

Disposed in the spaces between the back walls of the slide blocks 35 and 36 are wedge blocks 53 and 54k having inclinedfaces 55 and 56 which 'slidably seat on the inclined walls 18 and 19, and which have vertical front faces 57 and 58 which slidably bear againstthe outer vertical faces 51 and 52 of the slide blocks. The wedge blocks are normally disposed with their upper faces projecting above the top faces 29 and 21 of the base block and with their lower edges spaced from the bottom wall 17 of the chan nel, as particularlyshown in Figure 2, so that the wedge blocks may be moved downwardly toa position-so that their top faces will extend flush with the top faces of the .base block, the wedge blocks serving as a means for advancing the slide blocks in opposition to the springs f? and 48, as will be later described.

The mandrel 24,, slide blocks. 35 and'Bti,

and wedge blocks 53 and 5-1, correspond in length to the width of the base block. so that'their ends will extend flush with the sides of the base block, as shown in Figure l; and the bars 39, 40, 4:2 and 413 extend in slidable contact with the said faces of the base block, thereby serving to hold the slide blocks and wedge blocks against longitudinal movement on the base block.

The rein or link to be operated on by the tool is illustrated in Figures 8 and at, which show a rein as blanked in readiness to be operated on by the tool,. which blanked rein comprises a cylindrical bar of metal having a major portion of its length formed with flat faces a and b on opposite sides thereof, which are continued into a cylindrical shank portion 0 of the bar, as shown in Fig ure 3. shank c is shaped to form the head portion of the jar, which head portion is tapered from the faces a and Z) and terminates in a rounded end 6,-- which extends transversely of the bar. A longitudinally extending slot 7 is formed in the flanged portion of the bar, as by punching, which slot has parallel side walls /z and i forming theinner faces of the side members and 4 a, constituting the link portionof the reiin which side portions have an outslde curvature formed in continuation of the shank portion 0. The rein blank is thus formed with ahuniform transverse diameter between the outer end of the shank c and the head and is formed of decreased thickness between the faces a and Z).

In carrying out my invention the concave faces 33 and 8d on the mandrel and the con cave faces on the slide blocks 35 and 36 are formed with curvatures corresponding to the curved periphery of the link blank, and

the mandrel 24 is formed of a. width be tween the upper end of the concave faces 38 and 34 at the juncture of the inclined-faces 31 and 32, substantially corresponding to the width of the slot fin the link blank, the depth of the slot'l6 and the heightof'the mandrel and slide blocks corresponding in distance to the thickness of the link blank between the fiat faces a and 6. -4 I The primary purpose of the invention is to provide a means for forging the side members 7 and k of the blank, so .as to form the inner faces 7L and c, thereof-convex on curvatures corresponding to the outside ourvature of the blank, as indicated at Z and m in Figure 5.

. In the operation of the inventionthe rein bl ank previously heated to a suitable degree or softness, 1s mitially positioned to extend transversely of therbase block 15 with the tapered portion of the mandrel Ql extenuing into the slot TWhen thus positioned the inside faces 7t and i of the rein side portions and 1% will ext-end vertically from the point of inclination of the inclined and con- The end of the bar opposite the cave'faces of the'mandrel, as shown inFigure 2. The upper face a ofthe rein blank Wlll then be disposed on a plane above the to drive the link blank into the space be-' tween the mandrel and the slide blocks, and also drive the wedge blocks downwardly to their lowermost position on the inclined faces of the base block channel. The upper face a. of the link blank in projecting above the upper face of the wedge blocks will initially receive the blow of the hammer which will drive the I link blank downwardly 'on opposite sides of the vmandrel; the link blank inovi'ng'well into the spacebetween the slide blocks before the hammer strikes the wedge blocks. The relative positions of the-linkblank. and the parts of the tool at this moment, is illustrated in Figure 6. On initial downward movement of the link blank, the curved faces of the mandrel will operate to slightly curve the lower portions of the inside faces h and i of the side members jand is. Continued movement of the hammer will cause it to impact on the wedge blocks and move the latter downward and thereby cause the slide blocks to advance with the continued downward movement of the link blank, so as to position the parts as shown in Figure 7 the bottom face I; of the link blank then bearing on the fiat face 17 of the base block and the outer curved faces of the side members bearing against the curved faces of the slide blocks. The lower portion of the inner faces h and a of the side members jand is will then be curved as shown in Figure 7. In this operation a portion of the metal of the link blank is displaced butois caused to manually run into the length of the blank. On lifting the hammer head, the springs45 and 46 Wlll retract the slide blocks 35 and and thereby restore the wedge blocks vto thelr elevated position, as shown in Figure 8. The link blank is then lifted from its position on the tool,

and after being inverted is replaced astride the mandrel as shown in Figure 9; whereupon the hammer is again operated so as to drive the link blank and the wedge blocks downwardly into the position shown in Figure 10, thereby rounding the other half of the fiat faces h and 71. On again retracting the hammer head the slide blocks will be withdrawn out of contact withthe side faces of the link blank, as shown in Figure 11,

whereupon the blank may be removed. I s

The side members 7' and k of thelmk portion of the blank will then be formed with the convex faces 'Z' F1gure'5 The link blank 7 may be of any desired length with the slot' therein of greater length than the width of the tool, in which event the bl'ankis worked from one end of the-machine to the otherby advancing the blank step by step after each operation on eachsidetherebfl "It may be necessary in order-to form the blank true that the blank 'be'reworked in thetool. 1 1

After the'side members and 76 have been given the proper formation, the socket and head portions of the linkmay be formed as desired. r r The faces a and b' of the blank ma-y be formed with longitudinal concave depres sions at extending between the head (Z and the end of the slot f, as-shown-inFigure 12, by means of my, forging tool, by removing the mandrel? 24s and replacing itIwit-h a man drel (30, such as sliown in Figure -14, which and 'm as shown in l mandrelhas'a' convex head portion 61 adaptiticula-r application thereof, I do not limit myself to the exact details of construction and arrangement shown, but may employ such changes and modifications as come within the scope of theappended claims.

I claim 1. A tool for forming the side members of a link, comprising a base block formed with a transverse channel having inclined end'walls, a forming mandrel'oarried on said base block Within the channel, a pair of slide blocks "arranged between the mandrel and the inclined walls of the channel, Wedge blocks. interposed between the slide blocks and the inclined walls normally projecting above the upper face of the base block and'adapted onbeing driven clownwardly to advance the slide blocks, cross heads at the end of the baseblock, bars connecting the cross heads to the slide heads operable to retract the slide'blocks. 2, In a tool for forming the side members of a link the combination of a base block formed with a transverse channel having fixed inclined end walls, a forming blocks, and springs bearing on said cross mandrel carried on said base block within "the channel, a sliding block resiliently secured to each of said end Walls, and a wedge shaped member between each of said sliding blocks and its corresponding end wall for forcing said slidin'g'block towards said mandrel.

members of links, comprising a base blocl: formed with a channel having a flat bot tom wall and inclined end Walls, a forming mandrel projecting upwardly from the bottom of said channel, a pair of slide blocks arranged on the opposite sides oi the mandrel and slidably bearing on the bottom Wall of the channel, spring means for normally maintaining said slide blocks in a retracted position against the end Walls of the channel, and a pair of Wedge blocks seating on the inclined end Walls or the channel adapted on being driven downwardly to advance said slide blocks toward each other against the opposite sides of a link. i V c 4:. A tool for forming the side members of a link comprising a base block formed with a transverse channel having inclined end Walls, a forming mandrel carried on said base block Within the channel, a pair of slide blocks arranged between the man drel and the inclined Walls of the channel, Wedge blocks interposed between the slide blocks and the inclined Walls normally pro jecting above the upper face of the base block and vadapted on being driven downconnecting the cross heads to the slide blocks. V 7

5. A tool for forming the side members of a link comprising a base block formed with a transverse channel having inclined end Walls, a forming mandrel carried on said base block Within the channel, a pair of slide blocks arranged between the mandrel and the inclined Walls. of the channel, Wedge blocks interposed between the slide blocks and the inclined Walls normally projecting above the upper face-of the base block and adapted on being driven downwardly to ac Vance the slide blocks, cross heads at the end of the base block, and bars connecting the cross heads to the slide bloclzs, means, bearlng on said cross heads operable to retract the slide blocks.

RICHARD ARMOUR. 

